Coffee leacher



Patented July ,1939 2,164,399

UNITED STATES PATENT oFFicE coFFzi tzfrcnElb I hpafiflflffilf'llil2321:2024

'2 Claims. (01. 53-3) My invention relates to improvements in coffee the bottom 6 has an upthrust boss l5 whicn leachers or devices for preparing-a coffee bevserves as a seat and pilot to receivethe open erage or infusion from the ground coffee beans. lower end of the pump tube or cylinder l6 which The main object of the invention is to provide is of elongated tubular form as shown. From the 5 a device by which the necessary passage of the bottom 6 of the pot on which it is held by the 5 water through the groundcoffee may be brought boss l5, the tube l6 extends upward vertically about by a leaching or iixiviating action such and its upper end (also open) seats in a pocket as will hasten the process and reduce the perl1 formed in the underside of the cover II at a centage of the objectional narcotic ingredient repoint in vertical alignment with the boss 15. 10 sulting in the solution. With the cover II in place the pump tube l6 is 10 Another object is to provide a device of this thus held'vertically in the pot but, when the kind in which the actual operation of preparing cover is removed, the tube may be readily lifted the coffee beverage may be carried out right at out for washing and cleaning. Some distance the table-and without placing the device itself from its upper end'an annular suspension ring on the stove. I8 is horizontally supported from the pump tube 15 A further object is to provide a device of this IS by means of an eye or band [9 which encircles kind in a simple, durable, inexpensive and readily the tube as shown. This ring I8 extends -rearw n d f m, wardly from the pump tube as shown and, with The foregoing and other more specific objects the tube in place in the pot, the free extremity of my invention will be made apparent in the of thering rests upon a ledge or shoulder 20 20 course of the following detailed specification, extended inwardly from the rear portion of the reference being bad to the accompanying drawpot. At its frontal side the ring l8 has an arming wherein I v ate inwardly turned portion 2| which receives Figure 1 is a vertical sectional view of my the adjacent rear portion of the pump tube I6 device; in such manner that the tube eifectually is par- 25 Figure 2 is a horizontal cross section along the tially disposed within the confines of the ring line 2-2 in Figure l; itself. From a point a short distance above the Figure 3 is a fragmental vertical section showring I8 to a point adjacent its upper end the ing a modified assembly. tube is cut away to form a discharge opening 22.

Referring now with more particularity to the A piston or pump rod 23 is siidably mounted 30 drawing, in carrying out my invention, I provide through a bore-24 in the cover ll down into the a pot or container 5 of single compartment con-, pump tube 5 and carries at its inner or lower end struction having the bottom 5, side walls I and a piston 25 slidably fitting within the tube. At open top 8. A handle 9 is secured vertically to its upper extremity the rod 23 carries a knob one side of the pot and a spout III is provided at 26 threaded in place and serving as a handle by 5 the opposite side so that the pot may be lifted which the pump rod and piston may be vertically and tilted to pour out its contents in well known reciprocated in the tube. Adjacent its lower manner. A cover II is provided and is adapted end the tube |6 also has a series of inlet apertc'seat with a frictional engagement down into tures '21 so located that the piston 25 may -be 40 the upper rim I2 of the pot against a shoulder l3 lowered to a point beneath these apertures. 40 extended inwardly as shown, this cover also hav- Therefore, when the pot 5 is partially filled with ing a marginal flange It to overlie the pot rim as water and the piston is lowered to. this point, shown. It may here be stated that the'cover II the water will enter the tube at 21 and, by pull may be provided with a locking device of any ing upwardly on the knob 26, the water in the suitable form to hold it in place on the pot, tube may be carried upwardly and discharged 5 should a mere frictional engagement be deemed through the opening 22. This action may of, insufficient to hold the cover. The cover may course be repeated as long as desired by reclproalso be hinged to the potif so desired and as cating the pump rod as described. will be hereinafter further recited. A coffee container, basket or cup 28 is provided For convenience in description the side of the and is of such diameter as to pass easily through 5 pot at which the spout III is located is hereinafter the ring l8 wherein it is held by engagement of termed the frontal side and the opposite side a marginally turned flange 29 with the ring. a carrying the handle 9 is termed the rear or rear This basket 28 is perforated as at 30 so that side of the pot. the water may run through but these perfora- Adjacent then to this frontal side of the pot tions are so small that ground coffee placed in 5 the basket cannot escape. The frontal side of the basket is arcuately depressed from top to bottom as at 3| to fit against the adjacent rounded side of the pump tube It. A perforated cover plate 32 may placed over the basket 28 whereon it is retained by engagement of the notch 33 with the tube It as shown. The perforations 34 in this plate 32 increase in size outwardly away from the pump tube l6 so that the water discharged from the tube at 22 will be evenly dis-' tributed over the entire surface area of the basket 28 and over the coffee therein.

The cover II has an opening 35 located above tube It causing it to pass down through the coffeeand bring about the desired leaching or lixiviat- -ing action. After the, coifee solution is thus prepared it may be poured off as required.

The advantages of this method of preparing the coffee are many. In the first place by regulating the number of pump strokes, the strength of the coffee solution may be varied and, since a minimum-of washingf action of the water through the coffee is thus attained, the amount'or percentage of the narcotic ingredient extracted from the coifee is greatly reduced. Then too, the coffee may be prepared right at the table when ready and it is not necessary to heat the pot and then allow it to stand and "settle as is now required.

The various parts may all be readily taken apart for cleaning when desired and the entire assembly is durable and convenient. In some instances it may be desirable to substitute a fabric bag or sack for the metal coffee container 28, as indicated at 28a in Figure 3, and for thispurpose the ring l8 will still serve as a support simply by providing the bag 28a itself with a ring 31 slightly larger in diameter than the ring l8 as clearly shown. V

Attention may here be directed to the preferred shape of the pot wherein it is given an ovate shape or contour in horizontal cross section as shown in Figure 2 with the major axis at the rear and the minor axis at the front. This conformation places the greater part of the weight adjacent the handle S'and makes pouring easier at the relatively narrow frontal portion adjacent the spout. Also, the ring l8 and supported parts being substantially the same radius of the interior of the pot at its rear portion, this shape of the pot prevents any axial displacement of the ringand other parts.

The cover ll may, as previously mentioned, be hinged to the pot and for this arrangement the cover might be slotted from the bore 24 to the adjacent margin of the opening 35 so that, by removing the glass dome 36, the necessary clearance for the rod 23 would be provided as the cover was swung open.

It is understood that I may vary from the structure as herein shown and described, so as best to provide a practical device for the purposes intended, provided that such variations lie within the spirit and the scope of the appended claims. I claim:

1. In combination with a coffee pot having an open top, a handle at its rear side and a spout at its frontal side, a locating boss formed upon the inner face of the bottom of the pot adjacent the spout and in alignment with the spout and handle, a cover for the pot having upon its inner face a locating pocket adapted for vertical alignmentwith the locating boss of the bottom when the cover is closed upon the pot the pocket having an axial bore extended out through the cover, a pump tube dimensioned and adapted to seat within the pot between the cover and the bottom thereof with its lower end over the locating boss of the bottom and its upper end within the pocket of the cover when the latter is closed, the tube (being apertured at its lower end at points spaced upward from its lower extremity,- and being cut away at its upper end in spaced relation to the upper extremity thereof and at its inner side facing the handle, to provide a discharge opening, a pump rod slidably mounted through the bore of the cover and extended down into the tube, a piston at the lower end of the pump rod within the tube and adapted to pass down below the apertures of the lower end of the tube, and a perforate coffee basket removably supported in the upper end of the pot between the pump tube and the rear side of the pot, below the discharge opening of the upper end of the pump tube, the

basket being formed at its frontal side to partial-.

ly embrace the pump tube below the discharge opening for receiving, the full discharge from said opening.

2. In a device of the kind described, embodying ,a coffee pot having an-open top, a handle and spout at diametrically opposite sides, and a cover for frictionally closing the top, vertically aligned tube locating means onthe bottom and the cover adjacentthe spout and in diametrical alignment with the spout and the handle, a pump tube dimensioned and adapted to fit vertically within the pot between the locating means of the cover and the bottom when the cover is in place on the pot, the tubebeing apertured at its lower end and being cut away at its upper end to provide a discharge opening at the rear side thereof, a pump rod slidably mounted through'the cover and down into the pump tube, a piston at the lower end of the pump rod, a supporting ring removably mounted at the upper end of the pot between the pump tube and the rear side of the pot, the

ring including a portion for encircling the pump tube, means for supporting the rear portion of the ring, a perforate coffee basket removably mounted within said supporting ring, below the discharge opening of the tube, the basket being concaved down its frontal side to partially embrace the pump tube, below the discharge opening thereof and a perforate cover plate for the basket the perforations thereof increasing in size outwardly from the pump tube for providing an equalized distribution ofthe liquid discharged from the pump tube.

' ELMER E. GRANGER. 

